According to this, the arrangement consists of “wooden boxes with drawers that pullout in the front, and cards in octavo format ” (= DIN A5).
Luhmann's zettelkasten collection of cards was in octavo format, aka DIN A5 (148mm x 210mm or 5.8" x 8.3").
According to this, the arrangement consists of “wooden boxes with drawers that pullout in the front, and cards in octavo format ” (= DIN A5).
Luhmann's zettelkasten collection of cards was in octavo format, aka DIN A5 (148mm x 210mm or 5.8" x 8.3").